Device for the removal of a liner bolt from a sag mill

Abstract

A device for the removal of a liner bolt from a SAG mill including a support member for affixing to an exterior surface of the SAG mill and a ram affixed to the support member and having an end movable relative to the support member. The end serves for compressive abutment with a surface of a liner bolt. The support member includes a first arm, a second arm, and a strut connected to the first and second arms. The ram is affixed to the strut. A first bolt receptacle is formed on an end of the first arm and a second bolt receptacle is formed on an end of the second arm. The ram includes a cylindrical member affixed to and extending downwardly from the support member, a circular frame affixed to the support member and rigidly affixed to the cylindrical member, and a hydraulic ram having a body received within the cylindrical member.

I claim: 
     
       1. A device for removal of a liner bolt from a SAG mill comprising: a support means for affixing to an exterior surface of the SAG mill; and   a ram means affixed to said support means, said ram means having an end movable relative to said support means, said end for compressive abutment with a surface of the liner bolt.   
     
     
       2. The device of claim 1, said support means comprising: a first arm;   a second arm; and   a strut connected to said first and second arms, said ram means affixed to said strut.   
     
     
       3. The device of claim 2, said first arm extending outwardly at an obtuse angle from said strut, said second arm extending outwardly at an obtuse angle from said strut. 
     
     
       4. The device of claim 2, further comprising: a first bolt receptacle means formed on an end of said first arm, said first bolt receptacle means for removable attachment to a second liner bolt of the SAG mill; and   a second bolt receptacle means formed on an end of said second arm, said second bolt receptacle means for removable attachment to a third liner bolt of the SAG mill.   
     
     
       5. The device of claim 4, said first bolt receptacle means having a first hole formed on a surface at an end of said first arm, said second bolt receptacle means having a second hole formed on a surface at an end of said second arm, said first and second holes being symmetrically positioned relative to said ram means. 
     
     
       6. The device of claim 5, said surfaces of said first and second arms being inclined so as to conform to a circumference of the SAG mill. 
     
     
       7. The device of claim 5, each of said first and second holes having an ellipsoid configuration. 
     
     
       8. The device of claim 2, said strut positioned between respective ends of said first and second arms, said strut being a horizontal member. 
     
     
       9. The device of claim 2, further comprising: an eyelet affixed to and extending outwardly from at least one of said first and second arms.   
     
     
       10. The device of claim 2, said ram means comprising: a cylindrical member affixed to said strut and extending vertically downwardly therefrom, said cylindrical member positioned generally centrally between said first and second arms; and   a hydraulic ram having a body received within said cylindrical member, said hydraulic ram having said end extending outwardly therefrom, said end positioned on an opposite side of said body from said strut.   
     
     
       11. The device of claim 1, said ram means comprising: a cylindrical member affixed to and extending downwardly from said support means, said cylindrical member for receiving a hydraulic ram therein.   
     
     
       12. The device of claim 11, said ram means further comprising: a circular frame affixed to said support means, said cylindrical member being rigidly affixed to said circular frame.   
     
     
       13. The device of claim 11, said ram means further comprising: a hydraulic ram having a body received within said cylindrical member, said hydraulic ram having said end extending outwardly therefrom; and   a restraining means connected to said hydraulic ram, said restraining means for affixing said hydraulic ram within said cylindrical member.